Articles | Volume 8, issue 3
Earth Syst. Dynam., 8, 577–616, 2017
https://doi.org/10.5194/esd-8-577-2017
Earth Syst. Dynam., 8, 577–616, 2017
https://doi.org/10.5194/esd-8-577-2017

Research article 18 Jul 2017

Research article | 18 Jul 2017

Young people's burden: requirement of negative CO2 emissions

James Hansen et al.

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Short summary
Global temperature now exceeds +1.25 °C relative to 1880–1920, similar to warmth of the Eemian period. Keeping warming less than 1.5 °C or CO2 below 350 ppm now requires extraction of CO2 from the air. If rapid phaseout of fossil fuel emissions begins soon, most extraction can be via improved agricultural and forestry practices. In contrast, continued high emissions places a burden on young people of massive technological CO2 extraction with large risks, high costs and uncertain feasibility.
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